Did a Dyno Run

Smittie61984 · 05-02-2008, 02:12 PM

Learn something everyday. But my bike only redlines at 13.5k which they ran it to.

No Worries · 05-02-2008, 02:30 PM

Not bad. I have a Sport Rider magazine where they tested a 1999 F4 and got 88.8HP @ 12,500, and 41.6lb/ft @ 10,000. Your CO is too high, should be 4.0 or below. Could be dirty air filter, stuck choke, leaking float needle/seat, etc. Plus the HC is too high. Could just need new spark plugs.

Smittie61984 · 05-02-2008, 08:09 PM

brand new BMC air filter. Carbs just cleaned 6k ago with new Iridiums.

I talked to the guy who works on my bike when I don't (Brian Livengood for those who might know him through racing) do it myself. He said I just need to put some smaller jets in to lean it out. I have Factory Pro needles already.

He told me with a Dynotune and changing jets I could get high 80s or low 90s. That's with a Dynojet dyno(What he uses) and mid80s to high80s on a Factory Pro.

But paying $200 an hour(Normally $300 for carbed bikes) knowing carbs will have to come on and off which I'm sure is a long process isn't appealing to me. Maybe later on.

No Worries · 05-03-2008, 12:12 AM

Just remember that a dyno run is done at wide open throttle. I know we like to think we run at WFO all the time, but it's really probably only 1 percent of the time. A better indicator of correct jetting for most of us is reading the plugs. And 6K miles in a plugs life is a lifetime. Plus, when it's running rich, those iridium plugs foul faster than regular plugs.

05-02-2008, 02:12 PM	#1
Smittie61984 I give Squids a bad name Join Date: Mar 2008 Location: Fly Over State Moto: 1996 CBR600 F3 (AKA the Flying Turd) Posts: 4,742	Learn something everyday. But my bike only redlines at 13.5k which they ran it to. __________________ lifts - R.I.P.

05-02-2008, 08:09 PM	#3
Smittie61984 I give Squids a bad name Join Date: Mar 2008 Location: Fly Over State Moto: 1996 CBR600 F3 (AKA the Flying Turd) Posts: 4,742	brand new BMC air filter. Carbs just cleaned 6k ago with new Iridiums. I talked to the guy who works on my bike when I don't (Brian Livengood for those who might know him through racing) do it myself. He said I just need to put some smaller jets in to lean it out. I have Factory Pro needles already. He told me with a Dynotune and changing jets I could get high 80s or low 90s. That's with a Dynojet dyno(What he uses) and mid80s to high80s on a Factory Pro. But paying $200 an hour(Normally $300 for carbed bikes) knowing carbs will have to come on and off which I'm sure is a long process isn't appealing to me. Maybe later on. __________________ lifts - R.I.P.

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05-02-2008, 02:30 PM	#2
No Worries Keyboard Racer Join Date: Feb 2008 Location: Mile High City Moto: Old Superbikes Posts: 1,016	Not bad. I have a Sport Rider magazine where they tested a 1999 F4 and got 88.8HP @ 12,500, and 41.6lb/ft @ 10,000. Your CO is too high, should be 4.0 or below. Could be dirty air filter, stuck choke, leaking float needle/seat, etc. Plus the HC is too high. Could just need new spark plugs.

05-03-2008, 12:12 AM	#4
No Worries Keyboard Racer Join Date: Feb 2008 Location: Mile High City Moto: Old Superbikes Posts: 1,016	Just remember that a dyno run is done at wide open throttle. I know we like to think we run at WFO all the time, but it's really probably only 1 percent of the time. A better indicator of correct jetting for most of us is reading the plugs. And 6K miles in a plugs life is a lifetime. Plus, when it's running rich, those iridium plugs foul faster than regular plugs.